<html>  <head>    <style>      p {        color: white;      }      p.blue {        background-color: blue;      }      p.red {        background-color: red;      }    </style>  </head>  <body>    <p class="blue">      I am a paragraph. My background color is blue.    </p>    <p class="red">      I am a paragraph. My background color is red.    </p>  </body></html>